Certain downloads will cause firefox to fail downloading then get stuck writing the file to disk and cause the OS(file explorer) to crash. While this is happening trying to close firefox will cause the os and firefox to crash. trying to open firefox settings will cause firefox to crash.Trying to restart wont do anything since the os(win10) seams to wait for writes to disk to finish before shutting down. I tried to download something overnight and woke up to this issue so it will never finish downloading/writing the file to disk. Only fix is to hard shutdown(hold power button) then delete the file and parts file before lauching firefox and cancelling the download imediately when it tries to download it again. While this is happening the disk its trying to write the file to will show 100% usage and 0 read and write speed. I doubt this is a firefox issue and probably something on my end but any workarounds or insight into how firefox writes files to disk will help me figure out whats wrong. sorry about the scuffed image but I cant save a screenshot while this is happening.